Features: Can measure 8 standard wavelengths: 850/980/1300/1310/1490/1550/1625/1650nm, test range: -70dBm~+6dBm. Supports FC/SC/ST universal interface, RJ45 testing, simultaneous disply of linear mW and non-linear index dBm. Wavelength memory function, can memorize the test wavelength that set for the last time before shutdown. Supports backlight function and auto shutdown function. Leds lighting function, convenient for wires inspection in dark environment. With protective housing, reduce the loss to the machine caused by collision to a certain extent. Small size, convenient to carry anywhere. Specifications: Material: plastics Color: orange  Standard wavelengths: 850/980/1300/1310/1490/1550/1625/1650nm Test range: -70dBm~+6dBm Auto shutdown time: 10mins Working time: 72h Power-supply: 2 * AAA-batterys (not included) Working temperature: -10℃~+60℃ Storage temperature: -30℃~+70℃ Item size: 112 * 66 * 30mm / 4.41 * 2.6 * 1.18in Package size: 112 * 66 * 30mm / 4.41 * 2.6 * 1.18in Package weight: 150g / 5.29ounces Note: 1.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow a little measuring deviation due to manual measurement. 3.The network test remote tool in the picture is not included in the product. Package List: 1 * Cable Tester  1 * Black String 1 * User Manual